#42B8D7#42B8D7

#42B8D7 is a light, moderate cyan. Relative luminance 0.403; OKLCH L 73.0% C 0.112 H 218.9°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX#42B8D7
RGBrgb(66, 184, 215)
HSLhsl(192, 65%, 55%)
HSVhsv(192, 69%, 84%)
CMYKcmyk(69.3%, 14.4%, 0%, 15.7%)
CIE-LABlab(69.71, -22.89, -25.16)
CIE-LCHlch(69.71, 34.02, 227.70°)
OKLaboklab(72.97% -0.0871 -0.0702)
OKLCHoklch(72.97% 0.112 218.9)
XYZxyz(31.6479, 40.3419, 70.3956)
Luminance0.4035 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B8D7 #D76142
analogous
#42D7AB #42B8D7 #426ED7
triadic
#42B8D7 #D742B8 #B8D742
tetradic
#42B8D7 #AB42D7 #D76142 #6ED742
square
#42B8D7 #AB42D7 #D76142 #6ED742
split-complementary
#42B8D7 #D7426E #D7AB42
monochromatic
#1C6D83 #2698B5 #42B8D7 #75CBE2 #A7DEEC

Accessibility & contrast

On white

2.32
#42B8D7 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.07
#42B8D7 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D7
9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B8D7#FFFFFF#000000##000000
##42B8D71.002.329.079.07
#FFFFFF2.321.0021.0021.00
#0000009.0721.001.001.00
##0000009.0721.001.001.00

Color blindness preview

Protanopia (red-blind)
#A4B3D9
Deuteranopia (green-blind)
#90A4D7
Tritanopia (blue-blind)
#00C2C2
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #42b8d7;
/* rgb */ color: rgb(66, 184, 215);
/* oklch */ color: oklch(73.0% 0.112 218.9);
Tailwind
colors: {
  custom: {
    50: '#89cde3',
    500: '#42b8d7',
    950: '#000000',
  },
}
SCSS
$custom: #42b8d7;
$custom-light: #89cde3;
$custom-dark: #000000;
JSON
{
  "hex": "#42b8d7",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 215
  },
  "hsl": {
    "h": 192.483,
    "s": 65.066,
    "l": 55.098
  },
  "oklch": {
    "l": 0.7297,
    "c": 0.11184,
    "h": 218.9
  },
  "luminance": 0.40346
}

Semantic roles & 50–950 ramp

primary
#42B8D7
secondary
#DAA89B
accent
#6340E8
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #42B8D7

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#42B8D7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva